How many movies have Hachirō Kai and Junko Asahina collaborated on?

They have worked on 5 movies together! Their first movie together was Female Teacher's Awakening (1981) while their highest rated movie together was Horny Working Girl: From 5 to 9 (1982). They have not worked together since Horny Working Girl: From 5 to 9 (1982). They are most known for their drama films together.